Pangenome analysis reveals yield- and fiber-related diversity and interspecific gene flow in Gossypium barbadense L.

• 全文链接

泛基因组分析揭示了海岛棉L中与产量和纤维相关的多样性和种间基因流

关键词：

来源：

NATURE COMMUNICATIONS

全文链接：

//agri.nais.net.cn/topic/downloadFile/432615d9-3cfe-4450-8c1b-0dcd12bb0ae6

来源地址：

https://www.nature.com/articles/s41467-025-60254-x

资源所属：

棉花遗传育种

类型：

学术文献

语种：

英语

原文发布日期：

2025-05-29

摘要：

Gossypium barbadense is renowned for its superior fiber quality, particularly its extra-long fibers, although its fiber yield is lower compared to G. hirsutum. Here, to further reveal fiber-related genomic variants of G. barbadense, we de novo assemble 12 genomes of G. barbadense that span the wild-to-domesticated continuum, and construct a graph-based pangenome by integrating these assemblies and 17 publicly available tetraploid cotton genome assemblies. We uncover the divergent evolutionary trajectories and subsequent exchanges between G. barbadense and G. hirsutum through investigation of structural variants (SVs). We perform the SV-based GWAS analysis in G. barbadense and identify four, three, and seven candidate SVs for fiber length, fiber strength, and lint percentage, respectively. Furthermore, we detect the underlying candidate genes and uncover the origin and distribution of favorable alleles, and reveal the tradeoff between lint percentage and fiber quality. These pangenome and trait-associated SVs provide insights into and resources for improving cotton fiber.